Re: [PATCH] drm/tinydrm: Fix drm_driver.fops.owner

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Den 25.03.2017 22.32, skrev Daniel Vetter:
On Sat, Mar 25, 2017 at 02:56:20PM +0100, Noralf Trønnes wrote:
drm_driver.fops can't be shared since the owner then becomes tinydrm.ko.
Move the fops declaration to the driver.

Reported-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
Signed-off-by: Noralf Trønnes <noralf@xxxxxxxxxxx>
Since it only "breaks" unloading (and only if you force-unload without
knowing what you're doing, which is explicitly a developer feature with a
big warning) I think perfectly ok to push this in only for 4.12.

---
  drivers/gpu/drm/tinydrm/core/tinydrm-core.c | 15 ---------------
  drivers/gpu/drm/tinydrm/mi0283qt.c          | 13 +++++++++++++
  include/drm/tinydrm/tinydrm.h               |  4 +---
  3 files changed, 14 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/tinydrm/core/tinydrm-core.c b/drivers/gpu/drm/tinydrm/core/tinydrm-core.c
index 6a257dd..fd25c7e5 100644
--- a/drivers/gpu/drm/tinydrm/core/tinydrm-core.c
+++ b/drivers/gpu/drm/tinydrm/core/tinydrm-core.c
@@ -122,21 +122,6 @@ void tinydrm_gem_cma_free_object(struct drm_gem_object *gem_obj)
  }
  EXPORT_SYMBOL_GPL(tinydrm_gem_cma_free_object);
-const struct file_operations tinydrm_fops = {
-	.owner		= THIS_MODULE,
-	.open		= drm_open,
-	.release	= drm_release,
-	.unlocked_ioctl	= drm_ioctl,
-#ifdef CONFIG_COMPAT
-	.compat_ioctl	= drm_compat_ioctl,
-#endif
-	.poll		= drm_poll,
-	.read		= drm_read,
-	.llseek		= no_llseek,
-	.mmap		= drm_gem_cma_mmap,
-};
-EXPORT_SYMBOL(tinydrm_fops);
-
  static struct drm_framebuffer *
  tinydrm_fb_create(struct drm_device *drm, struct drm_file *file_priv,
  		  const struct drm_mode_fb_cmd2 *mode_cmd)
diff --git a/drivers/gpu/drm/tinydrm/mi0283qt.c b/drivers/gpu/drm/tinydrm/mi0283qt.c
index b29fe86..fdca37a 100644
--- a/drivers/gpu/drm/tinydrm/mi0283qt.c
+++ b/drivers/gpu/drm/tinydrm/mi0283qt.c
@@ -132,9 +132,22 @@ static const struct drm_display_mode mi0283qt_mode = {
  	TINYDRM_MODE(320, 240, 58, 43),
  };
+static const struct file_operations mi0283qt_fops = {
+	.owner		= THIS_MODULE,
+	.open		= drm_open,
+	.release	= drm_release,
+	.unlocked_ioctl	= drm_ioctl,
+	.compat_ioctl	= drm_compat_ioctl,
+	.poll		= drm_poll,
+	.read		= drm_read,
+	.llseek		= no_llseek,
+	.mmap		= drm_gem_cma_mmap,
+};
And then you could use the shiny new DECLARE_DRM_GEM_CMA_FOPS here!

Can you pls respin on top of drm-misc-next?

Sure, I thought I neeeded to fix this in 4.11 first.

Noralf.

Thanks, Daniel

+
  static struct drm_driver mi0283qt_driver = {
  	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME |
  				  DRIVER_ATOMIC,
+	.fops			= &mi0283qt_fops,
  	TINYDRM_GEM_DRIVER_OPS,
  	.lastclose		= tinydrm_lastclose,
  	.debugfs_init		= mipi_dbi_debugfs_init,
diff --git a/include/drm/tinydrm/tinydrm.h b/include/drm/tinydrm/tinydrm.h
index cf9ca20..00b800d 100644
--- a/include/drm/tinydrm/tinydrm.h
+++ b/include/drm/tinydrm/tinydrm.h
@@ -58,8 +58,7 @@ pipe_to_tinydrm(struct drm_simple_display_pipe *pipe)
  	.gem_prime_mmap		= drm_gem_cma_prime_mmap, \
  	.dumb_create		= drm_gem_cma_dumb_create, \
  	.dumb_map_offset	= drm_gem_cma_dumb_map_offset, \
-	.dumb_destroy		= drm_gem_dumb_destroy, \
-	.fops			= &tinydrm_fops
+	.dumb_destroy		= drm_gem_dumb_destroy
/**
   * TINYDRM_MODE - tinydrm display mode
@@ -84,7 +83,6 @@ pipe_to_tinydrm(struct drm_simple_display_pipe *pipe)
  	.type = DRM_MODE_TYPE_DRIVER, \
  	.clock = 1 /* pass validation */
-extern const struct file_operations tinydrm_fops;
  void tinydrm_lastclose(struct drm_device *drm);
  void tinydrm_gem_cma_free_object(struct drm_gem_object *gem_obj);
  struct drm_gem_object *
--
2.10.2

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